To a large mixing bowl, add the shredded chicken, celery, scallions (reserve some of the greens for garnish on top), yogurt, softened cream cheese, buffalo sauce, blue cheese crumbles, garlic powder, onion powder, salt, and pepper. Mix to thoroughly combine.
1 pound Chicken Breasts, boneless, skinless, 2 Celery Stalks, 4 Scallions (green onions), 8 ounces Plain Greek Yogurt, 8 ounces Cream Cheese, softened, ½ cup Buffalo Sauce, ¼ cup Blue cheese crumbles, 1 teaspoon Garlic Powder, 1 teaspoon Onion powder, 1 teaspoon Salt, 1 teaspoon Ground Black Pepper, ½ cup Shredded Cheddar Cheese